What kind of glue can be used to repair a leaking car radiator?
3 Answers
Car radiator leaks can be repaired with AB glue. AB glue is another name for a two-component adhesive consisting of resin and hardener. AB glue must be mixed with the hardener to achieve the curing effect, and it is a type of room-temperature curing adhesive that does not require heat to harden. For radiator leaks, a strong leak sealant can also be used for sealing. If the leak persists, it is recommended to replace the car radiator with a new one promptly. The car radiator, also known as the heat exchanger, is a key component of the car's cooling system and part of the car engine. Its function is to dissipate heat. The coolant absorbs heat in the water jacket, flows to the radiator to dissipate the heat, and then returns to the water jacket to circulate, achieving temperature regulation. When the engine's water temperature is high, the water pump circulates the water repeatedly to reduce the engine's temperature, thereby protecting the engine. In winter, if the water temperature is too low, the water circulation will stop to prevent the engine from becoming too cold.
Having driven for many years, I know full well that a leaking radiator is no small matter. The radiator is responsible for heat dissipation, and the high-temperature, high-pressure environment makes makeshift repairs with glue extremely dangerous. Ordinary adhesives like 502 glue can melt or corrode under heat, completely unable to withstand the impact of coolant, potentially leading to larger leaks and causing engine overheating and failure. For temporary emergency fixes, I would opt for high-temperature-resistant epoxy glue or automotive-specific sealant, first cleaning and drying the leaking area, then carefully applying the adhesive and waiting for it to cure—but this is absolutely just a stopgap measure, barely suitable for short distances. Afterwards, a thorough professional repair is essential. A skilled technician can weld cracks or replace the radiator entirely—don't risk major damage for minor savings. Safety must always be the top priority; neglecting it comes at too high a cost.
Hey, as a DIY enthusiast, I once had a radiator leak and thought I'd try fixing it myself. You can't just use any glue—regular glue fails under heat. After some research, I used AB epoxy glue, cleaned the leak spot thoroughly, applied the glue tightly, and waited for it to dry. It actually sealed the leak well enough for me to drive to the repair shop. But this method isn't long-lasting—coolant circulation pressure can easily break the glue, so it won't hold for long. I recommend using high-temperature-resistant automotive glue, like some sealant brands, for emergencies. However, beginners should be cautious and confirm the material and leak size before attempting repairs. In the long run, replacing the radiator is the worry-free solution. DIY is fun, but know your limits—don’t take unnecessary risks for the sake of a hobby.
